8255215164 has 192 divisors, whose sum is σ = 23994786816. Its totient is φ = 2155216896.

The previous prime is 8255215123. The next prime is 8255215169. The reversal of 8255215164 is 4615125528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8255215169) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14306844 + ... + 14307420.

It is an arithmetic number, because the mean of its divisors is an integer number (124972848).

Almost surely, 2^8255215164 is an apocalyptic number.

8255215164 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8255215164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11997393408).

8255215164 is an abundant number, since it is smaller than the sum of its proper divisors (15739571652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8255215164 is a wasteful number, since it uses less digits than its factorization.

8255215164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 882 counting only the distinct ones).

The product of its digits is 96000, while the sum is 39.

The square root of 8255215164 is about 90858.2146203633. The cubic root of 8255215164 is about 2021.0456929391.

The spelling of 8255215164 in words is "eight billion, two hundred fifty-five million, two hundred fifteen thousand, one hundred sixty-four".